/*
 * Copyright 2010 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package java.net;

public class InetAddress {

  private byte[] address;

  InetAddress(byte[] address) {
    this.address = address;
  }

  public static InetAddress getByName(String name) throws UnknownHostException {
    if (name == null || "localhost".equals(name)) {
      return new InetAddress(new byte[] {127, 0, 0, 1});
    }
    String[] parts = name.split("\\.");

    byte[] parsed = new byte[4];
    try {
      if (parts.length != 4) {
        throw new RuntimeException("4 parts expected");
      }
      for (int i = 0; i < 4; i++) {
        parsed[i] = (byte) Integer.parseInt(parts[i]);
      }
    } catch (Exception e) {
      parsed = new byte[] {127, 0, 0, 1};
    }
    return new InetAddress(parsed);
  }

  public static InetAddress getByAddress(byte[] address) throws UnknownHostException {
    return new InetAddress(address);
  }

  public byte[] getAddress() {
    return address;
  }

  public String getHostAddress() {
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < 4; i++) {
      if (i > 0) {
        sb.append('.');
      }
      sb.append(address[i] & 255);
    }
    return sb.toString();
  }

  public String toString() {
    return "/" + getHostAddress();
  }
}
